1/* Target-specific functions for ARM running under NetBSD.
2   Copyright 2002, 2003 Free Software Foundation, Inc.
3
4   This file is part of GDB.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 59 Temple Place - Suite 330,
19   Boston, MA 02111-1307, USA.  */
20
21#include "defs.h"
22#include "osabi.h"
23
24#include "arm-tdep.h"
25#include "nbsd-tdep.h"
26#include "solib-svr4.h"
27
28/* Description of the longjmp buffer.  */
29#define ARM_NBSD_JB_PC 24
30#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
31
32/* For compatibility with previous implemenations of GDB on arm/NetBSD,
33   override the default little-endian breakpoint.  */
34static const char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
35
36static int
37arm_netbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
38{
39  if (strcmp (name, "_PROCEDURE_LINKAGE_TABLE_") == 0)
40    return 1;
41
42  return 0;
43}
44
45static void
46arm_netbsd_init_abi_common (struct gdbarch_info info,
47			    struct gdbarch *gdbarch)
48{
49  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
50
51  tdep->lowest_pc = 0x8000;
52  tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
53  tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
54
55  tdep->jb_pc = ARM_NBSD_JB_PC;
56  tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
57}
58
59static void
60arm_netbsd_aout_init_abi (struct gdbarch_info info,
61			  struct gdbarch *gdbarch)
62{
63  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
64
65  arm_netbsd_init_abi_common (info, gdbarch);
66
67  set_gdbarch_in_solib_call_trampoline
68    (gdbarch, arm_netbsd_aout_in_solib_call_trampoline);
69  tdep->fp_model = ARM_FLOAT_SOFT_FPA;
70}
71
72static void
73arm_netbsd_elf_init_abi (struct gdbarch_info info,
74			 struct gdbarch *gdbarch)
75{
76  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
77
78  arm_netbsd_init_abi_common (info, gdbarch);
79
80  set_solib_svr4_fetch_link_map_offsets (gdbarch,
81                                nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
82
83  tdep->fp_model = ARM_FLOAT_SOFT_VFP;
84}
85
86static enum gdb_osabi
87arm_netbsd_aout_osabi_sniffer (bfd *abfd)
88{
89  if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
90    return GDB_OSABI_NETBSD_AOUT;
91
92  return GDB_OSABI_UNKNOWN;
93}
94
95void
96_initialize_arm_netbsd_tdep (void)
97{
98  gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
99				  arm_netbsd_aout_osabi_sniffer);
100
101  gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
102                          arm_netbsd_aout_init_abi);
103  gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
104                          arm_netbsd_elf_init_abi);
105}
106